03YukonNH
Full Access Member
when you send it to Blackstone, do they take into consideration the oil that you use? I use Quaker State Defy which has an elevated zinc level compared to most oil's that do not. Just wondering if they would take that into consideration? Do they ask you for your oil that you typically use?
Yes they do. I used to use Castrol High Mileage and they would always mention the sodium being a little high (usually an indication of coolant in the oil/head gasket problem) but they said it was actually an ingredient in the high mileage stuff. I guess it acted as a detergent or something. Anyways, since I switched to mobil 1 synthetic the sodium levels dropped right off and they said that was to be expected since I switched.